Zheyu Ma 5c3d753b87 drm/ttm: add a check against null pointer dereference ... [ Upstream commit 9e5c772954 ] When calling ttm_range_man_fini(), 'man' may be uninitialized, which may cause a null pointer dereference bug. Fix this by checking if it is a null pointer. This log reveals it: [ 7.902580 ] BUG: kernel NULL pointer dereference, address: 0000000000000058 [ 7.905721 ] RIP: 0010:ttm_range_man_fini+0x40/0x160 [ 7.911826 ] Call Trace: [ 7.911826 ] radeon_ttm_fini+0x167/0x210 [ 7.911826 ] radeon_bo_fini+0x15/0x40 [ 7.913767 ] rs400_fini+0x55/0x80 [ 7.914358 ] radeon_device_fini+0x3c/0x140 [ 7.914358 ] radeon_driver_unload_kms+0x5c/0xe0 [ 7.914358 ] radeon_driver_load_kms+0x13a/0x200 [ 7.914358 ] ? radeon_driver_unload_kms+0xe0/0xe0 [ 7.914358 ] drm_dev_register+0x1db/0x290 [ 7.914358 ] radeon_pci_probe+0x16a/0x230 [ 7.914358 ] local_pci_probe+0x4a/0xb0 Signed-off-by: Zheyu Ma <zheyuma97@gmail.com> Reviewed-by: Christian König <christian.koenig@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/1626274459-8148-1-git-send-email-zheyuma97@gmail.com Signed-off-by: Christian König <christian.koenig@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-07-31 08:16:12 +02:00
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Makefile	drm/ttm: give resource functions their own [ch] files	2020-08-12 15:51:03 +02:00
ttm_agp_backend.c	drm/ttm: protect against reentrant bind in the drivers	2020-09-18 06:14:00 +10:00
ttm_bo_util.c	drm/ttm: drop special pipeline accel cleanup function.	2020-09-18 06:23:06 +10:00
ttm_bo_vm.c	Merge drm/drm-next into drm-misc-next	2020-09-14 18:11:40 +02:00
ttm_bo.c	drm/ttm: fix eviction valuable range check.	2020-10-21 06:59:07 +10:00
ttm_execbuf_util.c	drm/ttm/amdgpu: consolidate ttm reserve paths	2020-08-06 12:16:31 +10:00
ttm_memory.c	drm/ttm: update kernel-doc line comments	2020-09-21 11:20:13 +02:00
ttm_module.c	Add SPDX idenitifier and clarify license	2018-05-15 13:44:27 -05:00
ttm_page_alloc_dma.c	drm/ttm/tt: add wrappers to set tt state.	2020-09-16 09:33:24 +10:00
ttm_page_alloc.c	drm/ttm/tt: add wrappers to set tt state.	2020-09-16 09:33:24 +10:00
ttm_range_manager.c	drm/ttm: add a check against null pointer dereference	2021-07-31 08:16:12 +02:00
ttm_resource.c	drm/ttm: remove available_caching	2020-09-15 16:05:19 +02:00
ttm_tt.c	drm/ttm: flip tt destroy ordering.	2020-09-18 06:14:41 +10:00